<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2016/9/28 0028
 * Time: 下午 6:26
 */
$line=1;
while ($line<=5){
    $empty_pos=$star_pos=1;
    $empty=5-$line;
    $star=2*$line-1;
    while($empty_pos<=$empty){
        echo '&nbsp;';
        ++$empty_pos;
    }
    while($star_pos<=$star){
        echo '*';
        ++$star_pos;
    }
    echo '<br>';
    ++$line;
}